From January 2015, she started to practice leetcode questions; she trains herself to stay focus, develops "muscle" memory when she practices those questions one by one. 2015年初, Julia开始参与做Leetcode, 开通自己第一个博客. 刷Leet code的题目, 她看了很多的代码, 每个人那学一点, 也开通Github, 发表自己的代码, 尝试写自己的一些体会. She learns from her favorite sports – tennis, 10,000 serves practice builds up good memory for a great serve. Just keep going. Hard work beats talent when talent fails to work hard.
Quite a bit. But I usually have the calculations handy. So like I’ll estimate users, then guess their number of API calls, then figure out the qps. Like Facebook news feed, 1 billion users, 250 million daily active, each checks their feed 10 times a day. There’s 2.5b calls, or 100m per hour, or 16m a minute, or 250,000 per second. Done.
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